Question: What are the computational problem which start with the letter s
Paraphrase: What what is tall speed get ready track gage BY 1435 mm track gage that starts with LETTERS V
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q3435924 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 's')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: shortest path problem, shortest path problem, Search problem, Search problem, shortest common superstring, shortest common superstring, Shortest common supersequence, Shortest common supersequence, Superstabilization, Superstabilization, Set balancing, Set balancing, single-source shortest path problem, single-source shortest path problem